HESI A2 Chemistry
Which of the following is true?
water is not a good conductor
what makes up an atomic number?
amount of protons=amount of electrons which makes it neutral
van der Waals forces
the two weakest inte
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HESI A2 Chemistry
Which of the following is true?
water is not a good conductor
what makes up an atomic number?
amount of protons=amount of electrons which makes it neutral
van der Waals forces
the two weakest intermolecular attractions- dispersion interactions and dipole forces
Which intermolecular force is the strongest?
hydrogen bonding
Your recent answers have been mostly right!
How do you find atomic number?
Number of protons
How do You find atomic mass?
protons + neutrons
What is the oxidation reaction of Mg?
Mg+2
What is the process called when hydrogen and hydroxide are combined?
Neutralization
What kind of bonding occurs when opposite changes are attracted to one another?
ionic bonding
atomic mass
proton + Neutrons
dispersion forces (London dispersion forces)
the weakest of all molecular interactions, are caused by the motion of electrons
What is the charge of magnesium?
2+
moles to grams conversion
Multiply
What is the systematic name for ammonia ?
Nitrogen Trihydrate
What do catalysts do?
speed up the rate of a chemical reaction without being consumed
lowers the amount of activation energy for a chemical reaction
What does the law of conservation of energy state?
Energy cannot be created or destroyed, it simply changes form.
What is the term for the amount of heat necessary to raise the temperature if 1 gram of that
molecule by 1 Celsius?
Specific heat
What value is more acidic ?
6.1(the lowest number)
what is the scientific notation of 1.15 to 10 power -3
0.00115
An isotope is the same number of protons but different
neutron
Which is true ?
Fe(-) is smaller then Fe
where can you find eletrons?
orbit
What is the process called when you are most likely to encounter an electron?
obrital??
what is the strongest type of bond?
covalent bond
What is NAOH considered in the equation?
left side=Reactant
what forms of water can be seen on earth?
liquid
vapor
gas
what structure is formed from two amino acids and a peptide bond?
protein
what is an example of an alloy?
two metals
Carbon-14
8 Neutrons
6 protons
6 electrons
polyatomic for copper(1) cyanide
Cu+CNatomic number
protons
Found of the earth
soild ,liquid ,gas
What is a transition metal?
Fe Zn Cu Ag Co
Where is magnesium located
second row and second column
What is the charge of oxygen?
2-
what is the name for ammonia?
NH3
what is the charge of noble gases?
0
Polarity is ?
based on the difference in electronegativity values for the elements involved
What reactions takes place in the nucleus to obtain stable nuclear configurations?
Nuclear reactions
The attraction of one dipole to another is?
Dipole interactions
Which change of matter is when no change is made to the chemical composition of a substance?
Physical
Matter that changes in volume with changes in temp and pressure ?
Gas
Matter that has a definite volume and a definite shape is a ____.
Solid
what is Fe and what kind of metal is it?
it is a transition metal and its called "iron"
What happens when a substance is mix?
its is chemically changed
what is van der waals equations?
Pv=nRT
K(potassium) charge
+1
What does ammonia have?
Nitrogen and Hydrogen
Grams to Moles conversion
divide by molar mass
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